01 - Preheat the oven to 350°F. Thoroughly grease and flour a 10-cup bundt pan or a 9x13-inch baking pan to ensure easy release.
02 - Whisk together the flour, baking powder, baking soda, salt, cinnamon, ginger, nutmeg, cloves, and allspice in a medium bowl and set aside.
03 - Using an electric mixer, beat the softened butter, granulated sugar, and brown sugar in a large bowl until the mixture is light and fluffy.
04 - Add eggs one at a time, mixing well after each addition to fully incorporate.
05 - Mix in the pumpkin purée, buttermilk, and vanilla extract until the batter is thoroughly combined.
06 - Gradually add the dry ingredient mixture to the wet ingredients, blending just until fully incorporated. Avoid overmixing.
07 - Gently fold in the chocolate chips, pecans or walnuts, dried cranberries, and orange zest until evenly distributed.
08 - Pour the batter into the prepared pan, smoothing the top with a spatula for even baking.
09 - Bake in the center of the oven for 45 to 55 minutes, or until a toothpick inserted in the center emerges clean.
10 - Allow the cake to cool in the pan for 15 minutes, then invert onto a wire rack and let cool completely.
11 - Whisk powdered sugar and orange juice in a small bowl until smooth. Drizzle glaze over the completely cooled cake; sprinkle lightly with ground cinnamon if desired.